Shearing tool or clipper.



Patented Sept. 23, 1902. J. K STEWART.

' SHEABING TOOL 0B CLIPPER,

(Application filed Apr. 14, 1902.) (No Model.)

Parent tlrrrcn.

JOHN K. STEWART, OF CHICAGO, ILLINOIS.

@HEA'FHNG TOOL OR CLEPPER.

SPECIFICATION forming" part of Letters Patent No. 709,522, dated September 23, 1902.

Application filed April 1 1, 1902. Serial No. 102,736. (No modeL To (all 7071/0711, it Vinny 110114.107

Be it known that 1, JOHN K. STEWART, a citizen of the United States, residing at Chicage, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Shearing Tools or Clippers, of which the following is a specification, reference being had to the accompanying drawings, forming a part hereof.

This invention is animprovementiu shearing'tools of the class which comprise a comb or fixed cutter, a vibrating cutter, an oscillating arm for operating the latter deriving power through the medium of a shaft extending through the handle of the tool; and it consists in detail improvements in the construction of the pivots and bearing parts of the cutter operating levers, as set out in the claims.

In the drawings, Figure l is a section ially through the driving-shaft of my proved clipper. Fig. 2 is a plan view of case and operating parts therein With cap removed.

The familiar and customary parts of a tool of this type are the main body of a case 1, in which are formed at the rear end, which constitutes the handle, bearings for the shaft 2, by which the cutter is operated.

3 is the comb or fixed cutter, attached to the forward end and under side of the case 1.

it is a cap or cover plate forming a part of the case and attached above the main body 1 and in the construction illustrated having the threaded boss 5, through which the tension-screw U is inserted, as more particular-l5, hereinafter described.

7 is the main or primary cutter-actuating lever. It is fulcrumed at its rear end in bearings formed or supported on the body of the case 1 and is engaged by the crank-stud and roll 9 on the cross-head or disk 10 of the shaft forward of its bearing in the case, said roll operatingin a vertical cylindrical guide-chair nel 1.1 in the operating-lever, with the effect of oscillating the lever horizontally, while the crank-stud and roll have a free path vertically in said cylindrical guide-channel. At

aximthe the the forward end the lever 7 engages the vibrating cutter 12 by means of the down wardly-projecting studs ll-5, while it bears upon said cutter by its terminal fingers 14: 1-1.

15 is the auxiliary pressure-lever, pivoted to the main cutter-actuating lever 7 and ex tending under it in a closefittiug channel which prevents any side motion. It bears at the forward end on the vibrating cutter f) at the middle point, and it is through this pres-- sure-lever that the terminal fingers Llll; of the actuating-leverTare caused to press upon the vibrating cutter toward the ends as the pressnrelever presses upon the same at the middle. This construction is afamiliar one, and it is not peculiar to the present invention. The auxiliary pressurelever 1.5 has, just a little forward of its pivot, an upstand ing boss, stud, or knob 16, which protrudes into an aperture 17 in the cutter-actuating lever 7, and within said aperture there is seated upon the top of said knob a saddle 18, having a downwardly-crmcave seat to ii t the knob and adapted by such seat to rock over it in any direct ion. The saddle is Widely extend ed at the top to form a broad upper face, and said face is slightly concaved at the center. The stud or knob 16, when at the middle po sition of its path of vibration, is substantially in line with the axisof theiension-screw (J, and said tension-scrcw, set through the cap of the case, terminates at the lower end in a flat face which bears upon the upper flat face of the saddle 18, the central. cavity 15) in said flat upper face of the saddle being enough less in extent than the diameter of the lower lat face of the tension-screw so that in the en tire range of vibration of the cutter-actuating lever said cavity does not pass beyond the margins of the end of the tension-screw. The tension-screw is made hollow, the cavity 2U adapting it to constitute an oil-cup, which can be filled from the top through the aperture closed by the screw 21., a small oil-port 22 being made in the bottom of the cavity opening through the center of the flatfaced end of the screw into the concavity 19, formerly described, in the top of the saddle, so that the oil may be delivered into said concavity freely and lubricate the surfaces of the saddle and tension-screw in the vibrating action.

The rear end of the cutter-actuating lever has a downwardly-extending spindle 28,which is journalcd in the spherical segment-ball 21, said segn'icnt-bz'tll being aportured vertically for the spindle and preferably slightly rounded at the upper end of the aperture to seat a correspondingly-rounded shoulder 25 at the base of the spindle. The ball 24: is lodged in a box formed by spherically cupping the upper side of the bearing 26 of the shaft 2 and capping the bearing with a suitable annular cap 27 to retain the ball while allowing it sufficient range of rolling action in any direction to fully accommodate the movements of the vibrating cutter as it accommodates itself to the track on which it moves on the comb or fixed cutter. The oscillating or vibrating movement for cutting, it will be understood,

is obtained about the axis of the spindle 23, said spindle turning in the ball and not requiring the ball to turn in its sea such action of the ball being provided for and occurring onlyin accommodating the cutter in its adjustment and adaptation t i the track on which it vibrates, as above stated.

The usual means may be employed to hold the tension-screw again t accidental displacement-to wit,aspring28 engaging the notches 29 in the flanged head of the screw.

I claim 1. A shearing-tool, comprising a fixed cutter and a vibrating cutter, a lever by which the latter is held in contact with the former, said lever having an upstanding knob or boss, a saddle having a downwardlyconcave seat by which it is lodged upon the top of the knob, said saddle having a Hat extended upper face, means for vibrating the cutter, and a tension-screw set through the top of the case havinga fiat lower end bearing upon the flat upper face of the saddle.

2. A shearing-tool, comprising a fixed cutter and a vibrating cutter, a lever by which the latter is held in contact with the former, said leverhaving an upstanding knob or boss, a saddle having a downwardly-concave seat by which it is lodged on the knob, said saddle having an extended fiat upper face provided with a central concavity, means for vibrating the cutter, and a tension-screw set through the top of the case, terminating at the lower end in a flat face which bears upon the upper flat face of the saddle beyond the margin of the concavity in the latter, said tension-screw having an oil-cavity, and an oilportleadingfrom such cavity opening through its lower terminal flat face above the concavity of the saddle.

3. A shearing-tool, comprising a fixed cutter and a vibrating cutter, a tension-lever by which the latter is held in contact with the former, a lever for actuating the vibrating cutter and the tension-lever, said cutter-actuating lever being apertured and the ten sion-lever being exposed from above through such aperture, an upstanding knob or boss on the tension-lever, a saddle extending into such aperture and having a downwardly-concave seat by which it is lodged on the knob or boss, said saddle having a broadly-extended flat upper face, and a tension-screw set through thecase, having a fiat face at the lower end, bearing upon the flat upper face of the saddle.

4. A shearing-tool, comprising a fixed cutter and a vibrating cutter, and a lever for actuating the latter, having at its end remote from its engagement with the cutter a downwardly-projectingspiudle,a ball having a vertical aperture to afford bearings for the spindle, a spherical seat in which such ball is retained, a longitudinal shaft and a crank-stud thereon engaging the lever forward ofits fulcrum in the ball to vibrate it about the axis of the spindle, and means mounted on the case forward of the crank engagement with the lever for causing the lever to press upon the vibrating cutter.

5. A shearing-tool, comprising a fixed cutter anda vibrating cutter, a lever for actuating the latter, a ball to which said lever is pivoted for such vibration at its end remote from its engagement with the vibrating cutter, aspherical seat in which such ball is retained, a longitudinal shaft, and acrank-stud thereon engaging the lever forward of its pivot in the ball to vibrate it about said pivot, and means mounted on the case forward of the crank engagement of the shaft with the lever for causing the lever to press upon the vibrating cutter.

6. A shearing-tool, comprising a fixed cutter and a vibrating cutter, a lever for actuating the latter, a longitudinal shaft and a crank-stud thereon engaging the lever (-0 Vibrate it, a ball to which the lever is pivoted for such vibration, having a spherical seat above the bearing of the longitudinal shaft rearward from the crank engagement of said shaft with the lever, and means mounted on the case forward of said crank engagement for causing the lever to press upon the vibrating cutter.

In testimony whereof I have hereunto set my hand at Chicago, Illinois, in the presence of two witnesses, this 11th day of April, A. D. 1902.

JOHN K. STEWART.

In presence of- T. J. CLARK, ASA J. MOORE.

ICC 

